Quantum Numbers!!?

Question: What are the n and l quantum numbers for the electrons with the highest energy in the following neutral atom. Express the answer as n,l, i.e., separate your values of n and l with a comma. Cd p.s. It is not 5,0 or 5,1 or 5,2 or 5,3, according to webassign

Answer: The electron configuration of cadmium is [Kr] 4d10 5s2 Although the 5s orbitals have a higher principal quantum number their energy is lower than the energy of the 4d orbitals Hence the answer is 4,3

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